Means for placing timber in position for sawing.



A. J. TBNOW & G. B. ANDERSSON.

MEANS FOR PLACING TIMBER IN POSITION FOR SAWING. APPLICATION FILED APR. 3, 1911.

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Patented Oct. 31, 1911.

UNITED STATES PATENT OFFICE.

ADOLF JULIUS TENOW AND CARL ERIK ANDERSSON, OF STOCKHOLM, SWEDEN, ASSIGNORS TO J. & G. G. BOLINDERS MEKANISKA VERKST'ADS AKTIEBOLAG,

OF STOCKHOLM, SWEDEN.

MEANS FOR PLACING TIMBER IN POSITION FOR SAWING.

Specification of Letters Patent.

Patented Oct. 31, 1911.

To all whom it may concern:

Be it known that we, ADOLF JULIUS TENOW and CARL ERIK ANDERssoN, subjects of the King of Sweden, residing at Stockholm, in the Kingdom of Sweden, have invented new and useful Improvements in Means for Placing Timber in Position for Sawing, of which the following is a specification, reference being had to the drawing accompanying and forming a part hereof.

In sawing timber in sawing machines the usual method of placing the timber in position for sawing consists in placing the rear end of the timber on the carriage, securing the timber thereon, and shifting the forward end of the timber laterally for placing the same just in front of the set of saw-blades of the sawing machine. For placing timber in position in such manner at least two workmen are required and there is, nevertheless, no certainty of the timber being placed right opposite the set of sawblades.

The object of the invention is to simplify and facilitate the operation of placing the timber in position for sawing.

According to this invention the forward end of the timber is automatically placed in position by the same being placed on a supporting member having such a form as to cause the said end of the timber to move by its own weight into a predetermined position just opposite the set of saw-blades. The part of the timber behind the said supporting member is thereupon freely swung about its fulcrum horizontally as well as vertically until the timber takes up the desired position. In so proceeding only one workman is required. The swinging of the timber about its fulcrum may be easily performed by placing the rear end of the timber on a rear supporting member adjustable laterally and vertically.

The support for the forward end of the timber consists of a guide-roller of such a form as to engage the forward moving timber, causing the same to move with the forward end into a predetermined position in front of the saws, and thereupon act to raise the forward end and cause the same to move in between the feedand pressurerollers of the sawing machine. During the continued forward movement of the timber the guide-roller is turned out of engagement with the timber and caused to take up a position ready to receive a new timber supplied for sawing.

In the drawing, we have shown parts of a sawing machine embodying our invention.

Figure l is a side view of a part of the sawing machine with the guide-roller in position to receive the forward end of a timber to be sawed. Fig. 2 is a similar side view with the guide-roller in the position which it takes up when it has moved the forward end of the timber laterally and vertically into position to enter between the forward pair of rollers. Fig. 3 is a plan view of the guide-roller and feed-rollers of the machine. Figs. 4: and 5 are side views of the guide-roller in different positions of the same.

Referring to the drawing, .a is the machine frame with feed-rollers b and pressure-rollers c. The guide-roller d journaled in a frame 6 is suitably formed as a double cone the generating lines of which have a varying inclination to the axis of the roller in such a manner that the said roller will be cylindrical or approximately cylindrical at one side, as shown in Figs. 4 and 5. The part of the roller opposite the cylindrical or approximately cylindrical part thereof is considerably heavier than the latter and, on account of the roller being journaled so as to freely turn, it will normally take up a position with the cylindrical or approximately cylindrical part turned upward. The whole surface of the guide-roller is suitably provided with teeth or grooves or the like, as shown in Figs. 1 and 2.

The described device works as follows: When the forward end of a timber is placed on the guide-roller d, in the position thereof shown in Figs. 1 and 4, and the timber is moved forward, it acts to turn the normally lowermost part of the roller cl upward into the position shown in Figs. 2 and 5. The forward end of the timber is thereby caused to place itself in the middle plane of the crotched part of the roller, as shown in Fig. 5, and on account of the guide-roller being journaled with the said middle plane just opposite the middle plane of the set of saws, the timber will, obviously, be placed in proper position for sawing. The placing of the timber into position begins to take place as soon as the guideroller commences to turn and is reliably effected when the crotched part of the roller is turned upward. At the same time the guide-roller also acts to raise the timber, as shown in Fig. 2, so as to allow the timber to pass in between the first pair of rollers b, c, and as the timber continues to move forward it turns the guide-roller farther in the same direction until the said roller loses its engagement with the timber and drops down into its initial position shown in Figs. 1 and 4.

In order to enable the guide-roller cl to be raised or lowered, the axle g of the said roller is adjustable in vertical slots 7' in the frame e. Instead of using a guide-roller 1n the shape of a double cone a roller may be used whlch is cylindrical 1n shape and provided at one side with obliquely extending arms or the like adapted to engage and raise the timber and place the same into position just opposite the set of saws.

o claim:

1. In a sawing machine, the combination of a set of saws, and a concave guide-roller journaled'eccentrically in front of the said saws so as to be adapted to raise the forward end of the Work approaching the saws.

2. In a sawing machine, the combination of a selfadjusting guide-roller rotatably journaled in front of the said set of saws and having the form of a double cone the generating lines of which have a varying inclination to the axis of the roller in such a manner that the said roller will be substantially cylindrical at one side, substantially as and for the purpose set forth.

3. In a sawing machine, the combination of a set of saws, and a guide-roller rotatably journaled in front of the said set of saws and having the form of a double cone the generating lines of which have a varying inclination to the axis of the roller in such a manner that the said roller will be substantially cylindrical at one side, the half of the roller opposite the cylindrical part being heavier than the said cylindrical half, substantially as and for the purpose set forth.

In testimony whereof we afiiX our signatures in presence of two witnesses.

ADOLF JULIUS TENOVV. CARL ERIK ANDERSSON. l Vitnesses:

AUG. SoRENsnN, E. MIRHKEN.

Copies 0! this patent may be obtained for five cents each, by addressing; the Commissioner of 'IPatents,

Washington, D. G. 

